<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>键盘事件</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div id="insert">
        <div class="key">按下键盘</div>
    </div>
    
     
</body>
<script src="javascript.js"></script>
</html>